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Multi-Tech Systems MT2834ZDX 用户手册

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页码 共 34
Chapter 3 – AT Commands, S-Registers, and Results Codes 
Multi-Tech Systems, Inc. MT2834ZDX User's Guide 
14
 
 
 
Command:  
&Rn    Clear to Send Control 
Values:  
n = 0, 1, or 2 
Default:  
1 
Description:  
&R0 Let CTS state follow RTS state when on line. 
 
&R1 Force CTS high (on). 
 
&R2 Let CTS drop on disconnect for time set by S24, then go high again. 
 
Command:  
&RAn    Asymmetrical Bit Rate 
Values:  
n = 0 or 1 
Default:  
0 
Description:  
&RA0 Enable asymmetrical bit rate in V.34 mode. 
 
&RA1 Disable asymmetrical bit rate in V.34 mode. 
 
Command:  
&RDn    Square Wave Ring Detect 
Values:  
n = 0 or 1 
Default:  
1 
Description:  
&RD0 Modem detects only sine wave rings. 
 
&RD1 Modem detects both sine and square wave rings. 
 
Command:  
&RFn    CTS/RTS Interaction Control 
Values:  
n = 0 or 1 
Default:  
1 
Description:  
&RF0 Let CTS follow RTS. 
 
&RF1 Let CTS act independently (use with &R). 
 
Command:  
&RN    Rate Negotiation 
Values:  
n/a 
Description:  
Forces the modem to perform a rate renegotiation while on line. You must escape to command 
mode to issue this command. 
 
Command:  
&RP     Immediate Line Probe 
Values:  
n/a 
Description:  
Initiates a retrain that makes the processor read line probe information if %DP1 is selected. Valid 
only when on line in V.34 mode. 
 
Command:  
&RR    Immediate Retrain 
Values:  
n/a 
Description:  
Forces the modem to perform an immediate retrain while on line. You must escape to command 
mode to issue this command. 
 
Command:  
$Rn    Retransmit Count 
Values:  
n = 0 or 1 
Default:  
0 
Description:  
$R0 Disconnect after 50 retransmits of a data block. 
 
$R1 Do not disconnect after 50 retransmits. 
 
Command:  
Sr=n    Set Register Value 
Values:  
r = S-register number; n varies 
Default:  
None 
Description:  
Set value of register S r to value of n, where n is entered in decimal format. 
 
Command:  
Sr?    Read Register Value 
Values:  
r = S-register number 
Default:  
None 
Description:  
Read value of register S r and display value in 3- digit decimal form. 
 
Command:  
&Sn     Data Set Ready Control 
Values:  
n = 0, 1, or 2 
Default:  
1 
Description:  
&S0 Force DSR high (on). 
 
&S1 Let DSR follow CD. 
 
&S2 DSR drops on disconnect, then goes high again.  (Used by some CBX phone systems.)